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- W2942666712 abstract "The intrinsic instability of hybrid perovskite materials induced by defect states arises as one major challenge hampering the commercialization of perovskite solar cells (PSCs). Here, we report a facile strategy of wrapping perovskite grains within an oligomeric silica (OS) matrix in a core–shell geometry, which can synchronously passivate the defects at surfaces and grain boundaries and stabilize the grains at the nanoscale. We observe a significant reduction of trap density and elongation of carrier lifetime in OS-wrapped perovskites, which yields an increased efficiency of 21.5% for p–i–n structured PSCs with a decent open-circuit voltage of 1.15 V and a fill factor of 0.81. This all-around nanoscale grain wrapping leads to remarkable improvement of the operational stability of PSCs, sustaining 80% of the efficiency after “burn-in” under full sunlight with UV for more than 5200 h. Our findings provide a new pathway towards efficient and stable PSCs." @default.
- W2942666712 created "2019-05-09" @default.
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- W2942666712 date "2019-05-07" @default.
- W2942666712 modified "2023-10-16" @default.
- W2942666712 title "Oligomeric Silica-Wrapped Perovskites Enable Synchronous Defect Passivation and Grain Stabilization for Efficient and Stable Perovskite Photovoltaics" @default.
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- W2942666712 doi "https://doi.org/10.1021/acsenergylett.9b00608" @default.
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